Improvement in machines for glazing and polishing saw-blades



J. TAYLOR, Jr., & J. PREST. improvement in Machines for Glazing and Polishing Saw Blades No. 130,333. Patented Aug. 6,1872.

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4M. PHOTU'LITHGGRAF/IIO MMX OSEUR/VES P500585] 7 UNI ED STATEs PATENT OFFICE.

' JOSEPH TAYLOR, JR, AND JAMES PREsT, OF SHEFFIELD, ENGLAND.

IMPROVEMENT IN MACHINES FOR GLAZING AND POLISHING SAW-BLADES.

Specification forming part of Letters Patent No. 130,333, dated August 6, 1872.

. SPECIFICATION.

We, JOSEPH TAYLOR, theyounger, sawmanufacturer, and JAMES PREsT, engineer, both of Sheffield, in the county of York and Kingdom of England, have invented Improvements in Machinery or Apparatus for Glazing and P01- ishing Saw Blades and other flat surfaces, parts of which improvements are applicable to the bearings of shafts and spindles gener ally, of which the following is a specification:

This invention relates to a peculiar combination and arrangement of machinery or apparatus for performing the operation known in the saw-trade as glazing, and also for effecting the polishing of saw-blades and other flat surfaces. According to this invention we employ a circular glazer, driven at a high velocity, and covered with leather or other suitable material, and situate above the saw-blade or other article to be glazed or polished, such article being held up to the glazer or polisher by a roller covered with India rubber, leather, or other suitable material, and driven at a slower speed than the glazer or polisher. In combination with the principal or top glazer or polisher there is a hopper or receptacle for emery or other polishing-powder, the said hopper being provided with an adjustable delivering-mouth for the purpose of regulating the distribution of the powder over the surface of the saw-blade or other article under treatment. In order to enable the same machine without adjustment by the attendant to operate upon articles of various thicknesses, we mount the bearings of the lower roll or supporting-surface upon slides acted upon by a weighted lever or levers or springs, so as to afford a yielding pressure, thus rendering the machine selfadjusting to any required thickness of work; and in order that our said invention may be fully understood, we shall now proceed more particularly to describe the same, and for that purpose shall refer to the several figures on the annexed sheet of drawing, the same letters of reference indicating corresponding parts in all the figures.

A A are the cast iron standards or side frames. B is the glazing or polishing roller or drum, mounted on the spindle O, which is carried in bearings formed in the fixed brackets a a. This glazer or polisher is covered with leather or other good polishing material. D

is a roller for holding up the saw or other like article to be polished or glazed against the drum B. The spindle of the roller D is mounted in' bearings carried by a verticallysliding carriage, E, which is pressed upward by the action of the weight F on the end of a lever-arm, b, attached to a rocking frame, L,

to which latter is fitted the lever-handle G.

first-motion shaft M, which receives its motion from a belt passing over the large drivin g-pulley N. A rapid rotating motion is imparted to the glazer B by an independent belt passing over the pulley O on the shaft of the glazing or polishing drum. IP are a pair of guiderollers covered with leather or India rubber, and mounted in slots in the brackets 01 d, bein g pressed together by pressing-screws for guiding the saw-blades between the glazer and the pressing-roller. A hand-wheel, Q Q, fast on one or both ends of the upper or lower guideroller, serves to facilitate the rotation of the same by hand when introducing a saw-blade between them. R is a curved hopper for holding emery or polishing-powder. It is secured to the cross-bar A of the standards, and gradually tapers to a narrow mouth or slot, which is more or less contracted by thumbscrews at f. This hopper allows sufficient emery to fall upon the upper surface of the saw-blade at a point just in front of where the glazer begins to operate. The polished or glazed saw-blades are received on the table S as fast as they pass under the glazer and are removed by an attendant situate at the end of the said table.-

Claims.

1. The combination of the upper polishingdrum B, the lower roll D covered with rubber or its equivalent, and driven positively at a lower speed than the drum, and the weight F supporting the adjustable bearings of the roll D, as set forth.

2. The combination, with the top glazing or names to this specification in the presence of polishing drum or roller, of a hopper having two subscribing Witnesses.

an adjustable discharge-mouth for supplying JOSEPH TAYLOR, JUNE. 7 emery or polishing-powder onto the upper sur- JAMES PREST.

face of the saw-blade or other like article to \Vitnesses:

be glazed orpolishethas hereinbefore described. ARTHUR WIGHTMAN, Solicitor, iS'leqfiield,

In testimony whereof we have signed our H. W. BRIERBY, His Clerk. 

